Question

1. Chalk contain calcium , carbon and oxygen in the ratio 10:3:12: . Find the percentage of carbon in chalk.
2. If in a stick of chalk , carbon is 3g , what is the weight of chalk stick

Answer 1

Answer:

1=12% 2=25g.

Step-by-step explanation:

the ratio of calcium carbon and oxygen =10:3:12

total value=10+3+12=25

the percentage of carbon=3×4=12%

2=the total weight=12%

number of grams of carbon=3g

=25g